| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.ozone.container.common.interfaces; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.ozone.container.common.volume.HddsVolume; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| /** |
| * This interface specifies the policy for choosing volumes to store replicas. |
| */ |
| @InterfaceAudience.Private |
| public interface VolumeChoosingPolicy { |
| |
| /** |
| * Choose a volume to place a container, |
| * given a list of volumes and the max container size sought for storage. |
| * |
| * The implementations of this interface must be thread-safe. |
| * |
| * @param volumes - a list of available volumes. |
| * @param maxContainerSize - the maximum size of the container for which a |
| * volume is sought. |
| * @return the chosen volume. |
| * @throws IOException when disks are unavailable or are full. |
| */ |
| HddsVolume chooseVolume(List<HddsVolume> volumes, long maxContainerSize) |
| throws IOException; |
| } |